As far as the eye can see

The Trás-os-Montes almond trees are explained in the legend of a Moorish prince who married a northern-European princess. Though happy in summer, she grew sad and wistful in winter, and ached for the snow-clad hills of her homeland. The prince hurried to the Algarve, from where he brought back the almond trees, so that from then on, every February when the trees blossomed, the princess beheld white as far as the eye could see.